<?php
declare(strict_types=1);

/**
 * This file is part of the Phalcon Framework.
 *
 * (c) Phalcon Team <team@phalconphp.com>
 *
 * For the full copyright and license information, please view the LICENSE.txt
 * file that was distributed with this source code.
 */

namespace Zephir\Optimizers\FunctionCall;

use Zephir\Call;
use Zephir\CompilationContext;
use Zephir\CompiledExpression;
use Zephir\CompilerException;
use Zephir\Optimizers\OptimizerAbstract;

class PhalconCssminOptimizer extends OptimizerAbstract
{
    /**
     * @param array              $expression
     * @param Call               $call
     * @param CompilationContext $context
     *
     * @return bool|CompiledExpression|mixed
     * @throws CompilerException
     */
    public function optimize(array $expression, Call $call, CompilationContext $context)
    {
        if (!isset($expression['parameters'])) {
            return false;
        }

        if (count($expression['parameters']) != 1) {
            throw new CompilerException("phalcon_cssmin only accepts one parameter", $expression);
        }

        /**
         * Process the expected symbol to be returned
         */
        $call->processExpectedReturn($context);

        $symbolVariable = $call->getSymbolVariable();
        if ($symbolVariable->getType() != 'variable') {
            throw new CompilerException("Returned values by functions can only be assigned to variant variables", $expression);
        }

        if ($call->mustInitSymbolVariable()) {
            $symbolVariable->initVariant($context);
        }

        $context->headersManager->add('phalcon/assets/filters/cssminifier');
        $symbolVariable->setDynamicTypes('string');

        $resolvedParams = $call->getResolvedParams($expression['parameters'], $context, $expression);

        $context->codePrinter->output('phalcon_cssmin(' . $symbolVariable->getName() . ', ' . $resolvedParams[0] . ' TSRMLS_CC);');

        return new CompiledExpression('variable', $symbolVariable->getRealName(), $expression);
    }
}
